نتایج جستجو برای: x ray detector
تعداد نتایج: 713717 فیلتر نتایج به سال:
To prevent illegal trade of weapons, X-ray scanning systems are used for non-intrusive inspection of import containers and cargoes at every seaport and airport. Conventional X-ray scanning system for cargoes is based mainly on X-rays of several MeV energy generated by an electron Linac. For high quality X-ray imaging, an X-ray source with good directionality, narrow width of energy spectrum and...
A normal-distribution-function-shaped superconducting tunnel junction (NDF-STJ) which consists of Nb/Al-AlOx/Al/Nb has been fabricated as an X-ray detector. Current voltage characteristics were measured at 0.4 K using three kinds of STJs, which have the dispersion parameters σ of 0.25, 0.45 and 0.75. These STJs showed very low subgap leakage current of about 5 nA. By irradiating with 5.9 keV X-...
A method of obtaining high sensitivity and precision in x-ray fluorescence analysis using semiconductor detector spectrometers is discussed. Monoenergetic exciting radiation is employed to generate characteristic x-rays from trace elements in thin, uniform specimens. Corrections for absorption effects are determined; enhancement effects are omitted as they are negligible for many thin specimens...
Zusammenfassung In dieser Arbeit wird ein Elektroneneinfangdetektor basierend auf weicher Röntgenionisation mit vergleichbarer Performance bezüglich radioaktiver Elektroneneinfangdetektoren geringsten Nachweisgrenzen im pptv-Bereich und einer Linearität über drei Größenordnungen vorgestellt. werden freie Elektronen erzeugt deren Menge die Entladung an Faraday-Detektorplatte ermittelt. Eintreten...
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